Why iMac shuts off when in sleep mode? Using latest System (Yosemite)

Can anyone tell me why my iMac 27", running on the latest system (Yosemite), all of a sudden started shutting off when put in the sleep mode?

Try resetting the SMC.
Additionally, look at the log files around the time the system shut down.
You might also take it in for testing/diagnosis.
Barry

Similar Messages

  • IPhone Shutting Off When In Sleep Mode

    So, I had a problem with my iphone, and took it to the mac store and got it replaced.
    now, my new iphone will completely shut down within minutes of being in sleep mode. it will only stay on in sleep mode when it's connected to power. is there any way to solve this problem without having to go to the mac store again?

    Hi!!
    I too have the same problem. I bought the 8GB iphone about 20 days back.
    Few days it worked ok, but during this time the battery was getting exhausted within 12-14Hrs. After that, one day it went into trans and stopped working. Now it only works when it is connected to the power otherwise it keeps on displaying the Apple Logo, and of course the mobile net work is disconnected.
    Can somebody help me resolving the said issue.

  • IPhone shuts off when in sleep mode

    So I am currently on a refurbished iPhone 3g because my other one had some visual issues. Now my problem is everytime i have my iPhone in sleep mode it shuts off after about 20-25 seconds and i can only turn it back on again by holding down the home button and sleep button together. Does anyone know a solution to this problem or had the same problem???
    Thanks, Michael

    Hey SurgeCentral,
    Are you using any 3rd-party accessories with the iPhone?
    Try syncing and backing up the data on the iPhone, then restore it and set it up as a new phone.
    http://docs.info.apple.com/article.html?artnum=305744
    Jason

  • Touch shuts off when in sleep mode.

    *Okay, so I have a 2nd gen. iPod Touch. I purchased a docking station a few months ago, but when I connected my iPod it froze, and I could not restart it for at least ten minutes. Ever since then it has had performance issues, it does not run smoothly, I can't play music out loud through its speaker or it freezes, and whenever I leave with for more than a few seconds in sleep the screen stays black and I have to restart it (which sometimes I can't even do).*
    Note: I've reset my iPod and I've restored it as well.

    Is your dockingstation labeled "Made for ipod"? If not, maybe your ipod got damaged when you connected it the first time.
    When you did the restore, did you set it up "as new ipod"? Restoring from your backup could install corrupt files again if the problem was software related. If you set it up as new ipod and still having problems, the hardware is damaged and your ipod needs service.

  • How do you prevent the computer from shutting down when in sleep mode?

    How do you prevent the computer from shutting down when in sleep mode and plugged in?

    Thanks tjk.
    Those are great suggestions and got me looking in places I had not considered before. Unfortunately, the problem remains. The System Preferences did not have the shut down option activated and there are no parental controls active on the computer.
    Any other suggestions are welcome.
    Brian

  • HT201412 All my Apps. are automatically shutting off when I try to use them, how do I get them to work again?

    All my apps. are automatically shutting off when I try to use them..  They were working just fine yesterday, and today they just kick me back to my home screen!  How do I get them to start working again.  And my sleep/wake button is broken...  so how do I reset if that is the solution?

    See:
    iOS: Troubleshooting applications purchased from the App Store
    Restore from backup. See:
    iOS: How to back up
    Restore to factory settings/new iPod

  • QOSMIO x870 shutting down when in sleep mode

    I'm not sure if this is working as intended or not.
    I was working with the ECO setting to put my computer to sleep after certain amount of time. Once it was asleep for a certain amount of time, it would go into a shutdown/hibernation mode. It turns back on in the state that it was in when it went to sleep.
    Also, if I have a program running and lock the computer, it will act like this as well when there is sleep time set.
    I thought that I would be able to lock my computer and run a download over-night, but when I went to my computer in the morning, my computer was shutdown/hibernating. It came back up to where it was, but it appears that it hadn't continued the download for much over an hour before shutting down.
    I don't think that this is intended, but I may be wrong.
    I'm still digging around trying to find settings in regards to this. But I have hibernate turned completely off.
    Is there some way to set the computer so that it won't shutdown/hibernate when in sleep mode and/or a locked screen?
    In the meantime, I'm trying setting the ECO settings to "Sleep :: Never" to try to accomplish my download without the computer shutting down/hibernating during the process. 

    Thanks tjk.
    Those are great suggestions and got me looking in places I had not considered before. Unfortunately, the problem remains. The System Preferences did not have the shut down option activated and there are no parental controls active on the computer.
    Any other suggestions are welcome.
    Brian

  • Instant Shut-off instead of Sleep Mode

    My Mac Pro recently started to instantly shut-off when I want to enter Sleep Mode manually. It also doesn't enter Sleep mode per Energy Saver Preferences any more.
    I am a bit at a loss at what could cause this behavior. I have diligently installed all software Apple updates.
    Anybody has encounter such problem before and know how to fix it?

    I tried just about everything including the SMC Reset. I got a copy of the Service Repair Manual and I performed the following test:
    System Reset
    Mac Pro (Early 2008) has a system reset switch on the logic board that may be used to restart
    the system while it is powered up. This switch can be used to determine if a computer that
    won’t consistently boot from a cold start has power supply issues. Follow these steps to reset the
    system:
    1. With the computer powered up, press the SYS_RST switch located in the upper right-hand
    corner of the logic board. To press the switch, use the nylon probe tool (Apple part number
    922-5065).
    2. If the computer boots after you press the SYS_RST switch, try shutting the computer off and
    restarting by pressing the front power button. If the computer restarts when you press the
    SYS_RST switch but not from a cold start, the power supply may need to be replaced.

  • How do I set iCal so that my alarms go off when in sleep mode?

    I'm pretty sure that I can set iCal to open a program (iTunes) as an alarm while the computer is in sleep mode but I can't find the setting. This morning it didn't go off while in sleep mode.
    Does anyone know how?

    I am pretty sure that you can't. You can however use the Energy Saver in System Preferences to wake the computer at a set time, and then your iCal alarm could fire.
    AK

  • MBP shuts down when in sleep mode

    I left my core i5 MBP 15 asleep during the day today with about a 85% charge. I opened the lid later this evening and the computer shut down and when I started it up, it only had a 58% charge. Please let me know what's going on or what I need to do. Thanks.

    Tech. Support told me to send my laptop to them after too much of my time wasted. They were trying to make me install the Thinkpad Power Manager software and driver once again. They even said it was normal if your laptop shuts down after a few minutes or hours in sleep mode which is completely stupid unless the battery drained off and that's not the case.
    And what's more important, my laptop was working faultlessly until I sent it to them for service. Then they changed the main board but they broke my LCD screen and caused the problem with Sleep mode. So I had to send it back, they changed the LCD with a 2005 HT14P12-100 when I had bought it in 2008 but they did nothing about the Sleep problem. And they want me to swallow that?
    Ok, they'll collect it on Monday or Tuesday because I told them I was fed up and I didn't want it like that. I don't expect they'll solve the problem but I don't want it back until my Thinkpad works like it used to do before they put their hands on it.
    Lenovo Thinkpad W500 4062-2XG (+2Gb RAM from Lenovo)
    Windows 7 Ultimate x64 bits
    No external monitors. No conflicting software.
    Latest BIOS and drivers.

  • Yoga 13 Shuts down when in sleep mode...

    I've always used sleep mode at night and quite frankly most of the time instead of shutting down my yoga. I know thats not good after reading some here but wanted to share history in case that has something to do with problem.
    Typically at night or when leaving office or just going to be off computer for a while I'll close the lid (which is set for sleep mode) and when I return I open it up, enter my password and I'm right where i left off. I have multiple spreadsheets or power points open so it's easier than shutting those down every time or even at night. But since yesterday, when I open it back up, it has shut down and has to start up from "off" vs sleep. All things open have to be recovered (xls, docs, ppt, etc) and chrome says it has shut down unexpectedly and asks if I want to restore tabs, etc.
    What is causing this change and how can I troubleshoot it and fix it?
    Help much appreciated.

    Right click on command prompt and select run as administrator. That should fix it and allow you to type that line

  • IPhone turns off when in sleep mode

    Hi my phone turns off after being in sleep/lock mode after a few minutes. to turn back on i have to hold the home and power buttons for a few seconds.
    When the phone is charging it does NOT turn of in sleep mode.
    My Info: iphone 2g..Fw 2.1
    I read a few post on here and other forum sites that say it may be a hardware issue or battery issue....If your having this problem please reply to this post to let it be known if there is a hardware problem or just isolated incidents thanks

    Hey SurgeCentral,
    Are you using any 3rd-party accessories with the iPhone?
    Try syncing and backing up the data on the iPhone, then restore it and set it up as a new phone.
    http://docs.info.apple.com/article.html?artnum=305744
    Jason

  • IMac shuts off when printing

    My iMac will completely shut off (quickly, like someone pulled the power cord) when I try to print a document. Once I reboot and try to print the document again, it works just fine. This happened when trying to print from Mail and Safari. Any ideas?
    Thanks

    I'm having the same problems
    What OS are you using?
    What computer specs?
    What program?
    What Superdrive have you got?
    Thanks

  • IdeaPad U400 shuts down when in sleep mode

    My IdeaPad U400 shuts down when sleeping. All programs terminate.
    I reviewed another poster's complaint about a similar problem several months. The response instructed the user to update the computer's drivers.
    I have updated my drivers. My computer still shuts down regularly while sleeping. Please help!

    Hi RuthAnne,
    Welcome to Lenovo Community Forums!
    I’m sorry to hear that the issue still persists even after re-installing the drivers as suggested in the previous posts, I also assume that you have updated the Video Driver(Win 7 or Win 8) & Chipset Driver (Win 7 or Win 8)specifically and checked if this resolves the issue.
    If the issue is same even after installing the above mentioned drivers, please backup the Data in the computer to any external hard drive and perform OSRI (Operating System Re-Install) to check and confirm the issue is with the
    OS (Operating System).
    NOTE: If the computer is shipped with pre-installed operating System OSRI can be performed using the instructions in U400 User Guide click here, check the steps to perform OKR(One Key Recovery) on page 23.
    Hope this helps!!!
    Best Regards
    Shiva Kumar
    Did someone help you today? Press the star on the left to thank them with a Kudo!
    If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"! This will help the rest of the Community with similar issues identify the verified solution and benefit from it.
    Follow @LenovoForums on Twitter!

  • IMac won't wake from sleep mode after latest update

    Hello, I have a Late 2013 27-inch iMac that has started acting strange, lately. After installing update 10.10.3, my iMac almost will regularly not wake once it enters sleep mode, after being idle for a certain period of time.
    Is anyone else having this problem, and/or have any solutions for this?
    Thank you in advance!

    Step 1
    Take all the applicable steps in this support article. That's the starting point for any further efforts to solve the problem. Please read the whole article carefully and don't skip any of the steps, including the ones under the heading Additional troubleshooting. If you don't understand any of the steps, ask for guidance.
    Also note that if you replaced the internal hard drive with an SSD, or if you're starting up from an external SSD, then that device may be causing the problem. Check the SSD manufacturer's website for a firmware update. The only solution may be to reinstall the original drive or avoid sleep altogether.
    Step 2
    If you're running OS X 10.8.5 or earlier, from the menu bar select
               ▹ System Preferences... ▹ Accessibility
    If the checkbox at the bottom marked
              Enable access for assistive devices
    is checked, uncheck it and test.
    If you're running OS X 10.9 or later, select
               ▹ System Preferences... ▹ Security & Privacy ▹ Privacy ▹ Accessibility
    If any applications are listed on the right and have a checked box next to them, uncheck all the boxes and test. You may first have to click the padlock icon in the lower left corner of the window and authenticate as an administrator to unlock the settings.
    Step 3
    In the Energy Saver pane of System Preferences, uncheck the box marked
              Put hard disks to sleep when possible
    Step 4
    If you don't already have a current backup, back up all data, then reinstall the OS.* You don't need to erase the startup volume, and you won't need the backup unless something goes wrong. If the system was upgraded from an older version of OS X, you may need the Apple ID and password you used.
    If you installed the Java runtime distributed by Apple and still need it, you'll have to reinstall it. The same goes for Xcode. All other data will be preserved.
    *The linked support article refers to OS X 10.10 ("Yosemite"), but the procedure is the same for OS X 10.7 ("Lion") and later.
    Step 5
    This and the next step must be taken as an administrator. If you have only one user account, you are the administrator.
    Launch the Console application in any of the following ways:
    ☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
    ☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
    ☞ Open LaunchPad and start typing the name.
    In the Console window, select
              DIAGNOSTIC AND USAGE INFORMATION ▹ Diagnostic and Usage Messages
    In the search box in the window's toolbar, enter "powerd" (without the quotes.)
    You may see one or more lines like this:
    com.apple.message.signature: Platform Failure
    If you do see that, and you did everything in the preceeding steps, then you're dealing with an internal hardware fault. Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.
    Step 6
    In the Console window, select
              DIAGNOSTIC AND USAGE INFORMATION ▹ System Diagnostic Reports
    (not Diagnostic and Usage Messages) from the log list on the left. If you don't see that heading, select
              View ▹ Show Log List
    from the menu bar.
    There is a disclosure triangle to the left of the list item. If the triangle is pointing to the right, click it so that it points down.
    You may see one or more reports with a name that begins with "Sleep Wake Failure" followed by a date. Select the most recent one. The contents of the report will appear on the right. Use copy and paste to post the entire contents—the text, not a screenshot.
    I know the report is long, maybe several hundred lines. Please post all of it anyway.

Maybe you are looking for